Release 2.3.0 (#4412)

- move user-preferences to edit submenu
- unify user preferences with other forms
- use light fieldset for all user-edit-forms
- support offcanvas elements
- allow to dynamically inject toolbar buttons (via plugins)
- use interface for formatting dates
- improve docker issue template
- bump version and composer packages

src/Controller/ProfileController.php

@@ -288,7 +288,7 @@ final class ProfileController extends AbstractController
         }
 
         return $this->render('user/preferences.html.twig', [
-            'tab' => 'preferences',
+            'tab' => 'settings',
             'user' => $profile,
             'form' => $form->createView(),
             'sections' => $sections